#pragma once

#ifndef FFT_ARRAYS_H
#define FFT_ARRAYS_H


// This array contains values from 0 to 255 with reverse bit order
static unsigned char g_reverse256[] = {
	0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,
	0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
	0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,
	0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
	0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,
	0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
	0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,
	0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
	0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,
	0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
	0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,
	0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
	0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,
	0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
	0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,
	0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
	0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,
	0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
	0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,
	0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
	0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,
	0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
	0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,
	0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
	0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,
	0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
	0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,
	0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
	0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,
	0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
	0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,
	0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF,
};


//This is array exp(-2*pi*j/2^n) for n= 1,...,32
//exp(-2*pi*j/2^n) = Complex( cos(2*pi/2^n), -sin(2*pi/2^n) )
static float g_w2n_re[32] = {
	-1.00000000000000000000000000000000f, // W2 calculator (copy/paste) : po, ps
	0.00000000000000000000000000000000f,  // W4: p/2=o, p/2=s
	0.70710678118654752440084436210485f,  // W8: p/4=o, p/4=s
	0.92387953251128675612818318939679f,  // p/8=o, p/8=s
	0.98078528040323044912618223613424f,  // p/16=
	0.99518472667219688624483695310948f,  // p/32=
	0.99879545620517239271477160475910f,  // p/64=
	0.99969881869620422011576564966617f,  // p/128=
	0.99992470183914454092164649119638f,  // p/256=
	0.99998117528260114265699043772857f,  // p/(2y9)=
	0.99999529380957617151158012570012f,  // p/(2y10)=
	0.99999882345170190992902571017153f,  // p/(2y11)=
	0.99999970586288221916022821773877f,  // p/(2y12)=
	0.99999992646571785114473148070739f,  // p/(2y13)=
	0.99999998161642929380834691540291f,  // p/(2y14)=
	0.99999999540410731289097193313961f,  // p/(2y15)=
	0.99999999885102682756267330779455f,  // p/(2y16)=
	0.99999999971275670684941397221864f,  // p/(2y17)=
	0.99999999992818917670977509588385f,  // p/(2y18)=
	0.99999999998204729417728262414778f,  // p/(2y19)=
	0.99999999999551182354431058417300f,  // p/(2y20)=
	0.99999999999887795588607701655175f,  // p/(2y21)=
	0.99999999999971948897151921479472f,  // p/(2y22)=
	0.99999999999992987224287980123973f,  // p/(2y23)=
	0.99999999999998246806071995015625f,  // p/(2y24)=
	0.99999999999999561701517998752946f,  // p/(2y25)=
	0.99999999999999890425379499688176f,  // p/(2y26)=
	0.99999999999999972606344874922040f,  // p/(2y27)=
	0.99999999999999993151586218730510f,  // p/(2y28)=
	0.99999999999999998287896554682627f,  // p/(2y29)=
	0.99999999999999999571974138670657f,  // p/(2y30)=
	0.99999999999999999892993534667664f,  // p/(2y31)=
};

static float g_w2n_im[32] = {
	0.00000000000000000000000000000000f,  // W2 calculator (copy/paste) : po, ps
	-1.00000000000000000000000000000000f, // W4: p/2=o, p/2=s
	-0.70710678118654752440084436210485f, // W8: p/4=o, p/4=s
	-0.38268343236508977172845998403040f, // p/8=o, p/8=s
	-0.19509032201612826784828486847702f, // p/16=
	-9.80171403295606019941955638886e-2f, // p/32=
	-4.90676743274180142549549769426e-2f, // p/64=
	-2.45412285229122880317345294592e-2f, // p/128=
	-1.22715382857199260794082619510e-2f, // p/256=
	-6.13588464915447535964023459037e-3f, // p/(2y9)=
	-3.06795676296597627014536549091e-3f, // p/(2y10)=
	-1.53398018628476561230369715026e-3f, // p/(2y11)=
	-7.66990318742704526938568357948e-4f, // p/(2y12)=
	-3.83495187571395589072461681181e-4f, // p/(2y13)=
	-1.91747597310703307439909561989e-4f, // p/(2y14)=
	-9.58737990959773458705172109764e-5f, // p/(2y15)=
	-4.79368996030668845490039904946e-5f, // p/(2y16)=
	-2.39684498084182187291865771650e-5f, // p/(2y17)=
	-1.19842249050697064215215615969e-5f, // p/(2y18)=
	-5.99211245264242784287971180889e-6f, // p/(2y19)=
	-2.99605622633466075045481280835e-6f, // p/(2y20)=
	-1.49802811316901122885427884615e-6f, // p/(2y21)=
	-7.49014056584715721130498566730e-7f, // p/(2y22)=
	-3.74507028292384123903169179084e-7f, // p/(2y23)=
	-1.87253514146195344868824576593e-7f, // p/(2y24)=
	-9.36267570730980827990672866808e-8f, // p/(2y25)=
	-4.68133785365490926951155181385e-8f, // p/(2y26)=
	-2.34066892682745527595054934190e-8f, // p/(2y27)=
	-1.17033446341372771812462135032e-8f, // p/(2y28)=
	-5.85167231706863869080979010083e-9f, // p/(2y29)=
	-2.92583615853431935792823046906e-9f, // p/(2y30)=
	-1.46291807926715968052953216186e-9f, // p/(2y31)=
};


#endif // FFT_ARRAYS_H
